1X4Q SOLUTION STRUCTURE OF PWI DOMAIN IN U4/U6 SMALL NUCLEAR RIBONUCLEOPROTEIN PRP3(HPRP3) RNA BINDING PROTEIN, NMR, PWI DOMAIN, STRUCTURAL GENOMICS, NPPSFA, NATIONAL PROJECT ON PROTEIN STRUCTURAL AND FUNCTIONAL ANALYSES, RIKEN STRUCTURAL GENOMICS/PROTEOMICS INITIATIVE, RSGI